Transmit descriptors
Some drivers allow you to tune the size of the transmit ring or the number of transmit descriptors.
The hardware transmit queue controls the maximum number of buffers
that can be queued to the adapter for concurrent transmission. One
descriptor typically only points to one buffer and a message might
be sent in multiple buffers. Many drivers do not allow you to change
the parameters.
| Adapter type | Feature code | ODM attribute | Default value | Range |
|---|---|---|---|---|
| Gigabit Ethernet PCI-X, SX or TX | 5700, 5701, 5706, 507 | txdesc_que_sz | 512 | 128-1024, multiple of 128 |